2. 外语
  3. Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say so

Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say so

admin2011-02-28  45
问题    Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say some scientists.
   Asteroids are bigger versions of the meteoroids (流星) that race across the night sky. Most orbit the sun far from Earth and don’t threaten us. But there are also thousands whose orbits put them on a collision course with Earth.
   Buy ＄50 million worth of new telescopes right now. Then spend ＄10 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we’ll have a way to change its course.
   Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn’t be cheap.
   Is it worth it? Two things experts consider when judging any risk are: 1) How likely the event is; and 2 ) How bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every.500, 000 years. Sounds pretty rare— but if one did fall, it would be the end of the world, "If we don’t take care of these big asteroids, they’ll take care of us," says one scientist. "It’s that simple."
   The cure, though, might be worse than the disease. Do we really want fleets of nuclear weapons sitting around on Earth? "The world has less to fear from? doomsday (毁灭性的) rocks than from a great nuclear fleet set against them," said a New York Times article.
What do people think of the suggestion of using nuclear weapons to alter the course of asteroids?
选项 A、It sounds practical but it may not solve the problem.
B、It may create more problems than it might solve.
C、It is a waste of money because a collision of asteroids with Earth is very unlikely.
D、Further research should be done before it is proved applicable.
答案B
解析 本题属细节性问题。文章的最后一段，是人们对这个问题的看法，因此读完这一段后，对比四个选项，看哪一个和文章的内容更加符合。首先，我们可以排除A选项It sounds practical but it may not solve the problem。在文章中并没有提及；B选项It may create more problems than it might solve。和原文最后的叙述很接近，是一个正确的选项；我们再看一下D选项Further research should be done before
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